Steroid hormones include____
a. thyroid hormones
b. oxytocin
c. insulin and glucagon
d. estrogen and testosterone
e. epinephrine and norepinephrine
ANSWER: d
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The defining characteristic(s) of the root cap is that it
A. protects the meristem from abrasion. B. is located at the tip of the root. C. secretes a lubricant for the growing root. D. plays a role in sensing gravity. E. All of the answer choices are correct.
Already existing on or in the body
What will be an ideal response?
Which of the following best described the surfaces of clay particles in soil?
a. They often bear positively charged ions. b. They release water to plants easily. c. They often bear negatively charged ions. d. They are generally hydrophobic.
What is the name of the replication unit in prokaryotes, and how does it differ in eukaryotes?
What will be an ideal response?